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Re: Disappearing Object Graphics... [message #29504 is a reply to message #29502]

Sun, 24 February 2002 09:30

Ted Cary
Messages: 53
Registered: October 2001

Member

>
> I really don't know, Ted. But I *do* know that whenever
> I see something really, really weird I've learned to
> turn the software renderer on. Could this be the problem?

At least someone agrees it's weird. I thought I was going insane, or else
that I was missing something obvious. But the renderer is not the problem.
I've tried all combinations of RENDERER and RETAIN, and in fact the problem
first showed up with the software renderer on. I'm scared now to use
IDLgrWindow::GetProperty to retrieve the renderer number--probably it is
-Pi. Anyway, I think I read somewhere that MACs always use the software
renderer--not sure of this, though.

At least I solved the speed problem I was having, but I'm not sure the
solution is newsgroup-worthy. After running PROFILER (thanks Rick Towler),
I noticed dozens of calls to BYTARR that did not make sense. Sure enough,
there was a forgotten and useless line of code using IDLgrImage::GetProperty
to retrieve the image data with every Widget_Draw motion event, probably
left over from some image check I was doing during debugging. After
removing that line the object graphics program runs faster now than the old
direct graphics version. I was pretty pleased with myself until things
started disappearing.

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[Message index]

		Re: Disappearing Object Graphics... By: Ted Cary on Mon, 25 February 2002 10:41
		Re: Disappearing Object Graphics... By: Rick Towler on Mon, 25 February 2002 09:33
		Re: Disappearing Object Graphics... By: David Fanning on Sun, 24 February 2002 19:27
		Re: Disappearing Object Graphics... By: Mark Hadfield on Sun, 24 February 2002 15:14
		Re: Disappearing Object Graphics... By: Ted Cary on Sun, 24 February 2002 09:30
		Re: Disappearing Object Graphics... By: David Fanning on Sat, 23 February 2002 19:13

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